Oakton pHTestr Pen Meters

Our most popular pH pen has upgraded to a larger LCD display with both pH and temperature values. Accuracy is also increased to ±0.01 pH. The double junction electrodes results in longer life in "dirty" water samples. The meter also features 3 point calibration, automatic temperature compensation (ATC) and is waterproof.

Upgraded pocket testers feature a new menu for easier operation and simple one button calibration. New cap design acts a stabilizing base to keep your tester standing upright. The cap is watertight allowing you to use the sample cup to calibrate, measure and store your meter.